Pencil



Aug. 18, 1925.*

H. Lf. FISCHER PENCIL filed De. 27, 1920 IWI/.67 Z107."-1

Patented Aug.i1i8 17925.

UNITED srar PATENT' -fwl-flfc-Y AAppneatii a-'nie-ki recenter 2"?, 19126.* semi no. 433,113.

Be it known thatfI, HowARnflisoHEn,

a citizen of the United States offlmeiica, f residing at St. Paul, inthe countygofltam sey and .State of Minnesotm have {'invented certain new and useful ,Improvemen Pencils., of which thepfollowing is' a s ication.

vThis invention relatesjt pencils", e primary feature of which isfto providefa?mef` chanical pencil thefoperatingneclianism of which is sectionally associated.'i'.og've'theraso that the different sections'can /beremoved separately from the pencilbarrel-or 'casing for refilling the pencil orjlforreplacing the arts. gencil can be entirelyremovedjfromthe cas ing to' leave the samer empty.- f This allows the interchanging ofpartsoriof the entire mechanism without changingA the barrel..

A feature of theinvention .is in a' pencil composed of very few simpleL arts including namely; a casing or barre a threaded member and an operating imber'and each of these parts are se arable from each other,

,or the threaded an operating member ican be removed collectively.'

This invention includes `,I.primarily a.

simple spring lock between theoperating member and the threaded member. The lock is`carried bythe operating` member, being freely rotatable Aon the same, when the op- "ing member of the Figure 5 is a detai Aof the rear end of the erating member and'threaded member are separated. The spring lockfrictionally en f gages under springvv tension, the smooth rear end of the threaded member, and remains stationar during the rotation of the operating mem er when the propelling means is 1n operation.

The invention also includes an engaging headon the 4operating member adapted to removed from the pencil and. partlyshown in cross section. y

Figure 4 1s an enlarged vlew of the operatencil.

The operating-"mechanism of this sliced from the closure for the' t loperating member, a portion of which is.-

- removed.A

Figure 6 is a .perspective view of the` 'n 1, V.spring locklng sleeve removed from lthe, operatlng member.

I `-The pencilA is formedwith latubular barrel or casing 10 the', forward end 11 of which is swaged toa conical shape to simulate the writing end of'lan ordinary pencil.

The pencil A is designed primarily to use a marking lead of a very small diameter and the end; 11 is formedv at the 'v apex with an opening 12 which is of a slightly greater diameter than the marking .lead 13 used in the pencil. A

The leadpropelling mechanism B is se cured'in the casmgA in a manner to propel or repel the marking lead-13. The-mechanism Blis positioned in the casing 10 so as to form a circular .magazine thereabout for extra marking leads, the forward end of the same being spaced from the casing by the washer member 14` and the rear end is attached and secured vto the casing by"the 'threaded closure4 collar 15. The mechanism vB is formed of sections consistin of the threaded tubular member 16 to w ich .the 'i washer 1 4 andthe closure 15 are secured and the operating member C, which is removable 4from the'- member 16. 'l

The o eratin member 17 which carriesjtlie lead member 1,8. Thef'member 18` is hel in the member 1,7 so 4that it will engagethe threads of the member 16 in a manner to propel or repel the markin in the pencil am? is provided-with spring arms 19 and 20 which causeit to engage the threads under spring tension..

YThe lead socket 21 is formed 'forreceiving the butt end of the markinglead '13 on the linger 20. The sprin arms 19 and 20 of the lead 'carrier 18 provide suicientdfriction between the member 17 and the threaded mem'- y or cap memberCvis comt posed 1o the tu ular longitudinally slotted ushing lead inwriting position i ber 16 to prevent free longitudinal move/ ment of the same, however, .in a bacl'tward or repellin operation of the mechanism B ie friction caused b thele'ad carrier 18 between the members, t e member 17 has atendency to unscrew or backout off the member 16. 'To overcomethis laction. a spring sleeve lock E is securedto the member 17 of the operating or cap member` C.

The lock E consists ofthe sprin collar 22 which is l@non stfftsd 0D. its ends an is vformed.

with a longitudinal slit to divide the same so that it will readily compressor expand and is adapted when the operating member C is inserted in the threaded member 16 to be compressed and engaged with considerable friction against the inner unthreaded Iportion 23 of the member 16. V

The collar 22 is held by the shoulders 24 and 25l freely rotatable on the member 17 adjacent the inner end 26 of the engaging head of the operating member C. When the operating member C is inserted into the member 16 the spring sleeve 22 is engaged by the member 16 and is held against rotation while the sleeve 22 engages the member 16 with considerable Jfriction, yet owing to its resiliency itis readily withdrawn when it is desired to separate the operating mem; ber C from the threaded member of the propelling mechanism B. The lock E prevents the operating or cap member C from moving longitudinally in the propelling mechanism during its operation, the friction of the lock E overcoming the tendency of the lead carrier 18, forcingA the operating member C out of the propelling mechanism when beingoperated to repel the marking lead. Y

The operating or cap member C is rovided with an engaging head 27 which 1s in thel form of a cap adapted to engage the outer surface of the eraser receiving socket 28 under friction. An eraser 29 is concealed beneath the cap or head 27 and lits within the socket 29.

The'propelling mechanism B is positioned in the casing 10 in a manner to form a circular magazine chamber 30 about the threaded portion 16 which' is closed on the forward end by the member 14 and on the rear end by the closure 15. Extra marking leads 13 are adapted to be contained in the magazine chamber.

When it is desired to lead in the socket .21 the operating member C is withdrawn from the member 16 either by a backward rotation and pull on the head 27 or by a. straight longitudinal non-rotary pull in a backward direction on the same. The cap or head 27 snugly over the eraser socket 28 so as not to begordinarily removed when removing the operating member C.

The propelling mechanism B which is made u p of the sections consistin of the threaded tubular member 16 and t e operating member C which is com sed of the longitudinally slotted member 1 are removable from the casing A collectively. In removing the parts collectively the members 16v and 17 together with the connecting parts are removed in their entirety from the casing A while the operating member C may be selectively removed from the propelling mechanism B either when the same is held in the casing A- or when the propelling mechanism in its entirety has been removed place a new markingv from the barrel. Thus it is obvious that the propelling mechanism can be. removed collectively from the barrel A without separating the sections if desired or the operating member C can be selected to be removed independent of the other sections of the propelling mechanism. The term selective is particularly adaptedto the part C of the propelling mechanism by reason of the fact that it can be removed or selected from the other parts of the propelling mechanism when the propelling means is held in the barrel or when it is removed from the same.

I claim:

1.` A pencilV comprising an enclosing casing, a sectional `lead propelling mechanism collectively or selectively removable from the said casing, and a spring sleeve lock adapted to be compressed in said lead propelling mechanism to lock and prevent the free longitudinal movement of the separable portion of said lead propelling means.

2. A pencil including' a lead propelling mechanism, comprising a tubular operating .member positioned within a tubular threaded member, said members being collectively or selectively removable from the pencil casing and a resilient locking means interposed between said operating member and said threaded member in a manner to `form a lock to hold said operating member against free longitudinal movement in said threaded member. 3. A pencil including a casing, a lead propelling means, comprising separable sections and a spring sleeve carried by one ofsaid sections adapted to form a lock to prevent longitudinal movement of said sections when in operating position in said pencil. y

4. A pencil comprising a casing, a tubular threaded member removably positioned within said casing and spaced therefrom to form a chamber thereabout, an unthreaded portion 'on one end of said member, an

Aoperating member freely rotatable in said threaded memberin a manner to propel or repel a marking lead, and a spring sleeve lock adapted vto hold said operating member against longitudinal movement by -engaging under spring tension the Unthreaded `portion of said threaded member.

5. A pencil having a casing, a lead propelling means comprising separable sections removable collectively or selectively, from said casing and a-tubular spring lock carried by one of said sections and interposed therebetween in a manner to form a lock to prevent free longitudinal movement of the separablesections during operation, but to allow free rotatable movement between said sections.

6. A spring lock for separable sections of a pencil lead propelling means, including a divided sleeve which is adapted to engage between the separable sections when 6 'a lead propelling means formed of separable sections adapted to be contained in said `caslng 1n a manner to be removed collectively or selectively, and a tubular locking member adapted, when compressed between 10 said sections, to form a lock to prevent the free separation of said sections during the operation. of sald propelling means.

8. Avmechamcal pencil compr1s1ng a casing, a separable sectional lead propelling mechanism within said casin g, a lead carrier adapted to form frictional resilient means between said sections and a tubular vloclingmember carried by one of said sections adapted to prevent longitudinal movement ofsaid sections in relation to each other during the operation of said lead lcarr1er.

9. A pencil, the combination of a casing, a threaded tubular member positionedwithin and spaced lfrom said casing to form a circular chamber thereabout, a tubular operating member adaptedv to extend through said threaded member, any nnthreaded portion on'said threaded member, a lead carrier adapted to form frictional resilient means between saidthreaded member and said operating member, and a resilient sleeve freely rotatable on said operating member vadapted to engage said unthreaded portion on said threaded memberto prevent longitudinal movement of said operating member in relation to said threaded member 'when said operating member is rotated to move said lead carrier longitudinally in said 40 threaded member.

10. A mechanical pencil,.including a lead propelling means comprising sections adapted to be separated from each other, a l lead carrierhaving transverse compensating means to form frictional 'contact between said sections and a sleeve rotatably attached to one of said 'sections against longitudinal movementin a manner to form frictional l(contact .between said sections Y to relation to each .ther whensaid lead carrier is moved longitudinally in said propel- .ling means.

11. A mechanical pencil, including aseverable 'lead propelling mechanism, a releasable lead carrier in saidpropelling mecha- `nism ladaptedl to move longitudinally to "house the marking leadwhenfmore than writing pressure is exerted against the lead W and a spring locking sleeve interposed bep 55 to house a separable leadpropelling means,

prevent 50 longitudinal movement of said sections in a compensating lead carrier in the lead propelling` means adapted to releasably hold a marking lead in writing position and a tubular member adapted to lock the sections of said lead propelling means against freev separation or longitudinal movement during the longitudinal movement of said lead carrier.

13.` A pencil including an engageable portion, lead propelling means, and an attachment for the latter comprising an element rotatably carried by a part of the propelling means and adapted to frictionally engage said engageable portion to hold said element against rotation and form a frictional' retaining means for said part.

14:. A pencil including lead propelling means, and a lock for said means comprising a spring sleeve rotatably held to a part of the propelling means and fixed against longitudinal movement relatively thereto.

Q15. A mechanical pencil having a sectional lead propelling means comprised of two main members, one of said members carrying a spring locking sleeve element freely journaled to rotate thereon and the other member adapted to receive said locking member to hold the members of said propelling mechanism freely rotatable and against longitudinal movement, but sepa- `rable from each other.

, ing arranged to be contracted onto the cap tube by its insertion into the casing, and lead-.feeding mechanism carried by the tube.

17. A pencil comprising a casing, a cap tube, a longitudinally divided contractible and expansible bearing sleeve on the cap tube and 'insertable therewith into the casing, said bearing sleeve being arranged to be contracted onto the cap tube by its insertion intov the casing, and lead-feeding mechanism carried by the tube.

18. A pencil comprising a casing, a cap tube, ay longitudinally divided contractible and expansible bearing sleeve on the cap tube and insertable therewith into the casing, said bearing sleeve being arranged to be contracted 'onto the cap tube by itsinsertion into the casing, meanson the cap tube for holding the bearing sleeve agalnst axial movement thereonyand lead-feeding mechanismcarried by the tube.

casing having yielding interlocking engagement to hold the bearing sleeve and cap tube against aXial movement in the casing, angl lead-feeding mechanism carried by the tu e.

20. A pencil comprising a casing, a cap tube, a longitudinally divided contractible and expansible bearing sleeve on the cap tube and insertable therewith into the casing, said bearing sleeve being arranged to be contracted onto the cap tube by its insertion into the casing, means on the cap tube for holding the bearing sleeve against axial movement thereon, said bearing sleeve and casing having yielding interlocking engage ment to hold the bearing sleeve and cap tube against axial movement in the casing, the lower end of the bearing sleeve being beveled for engagement With the casing to cause the same to be contracted thereby during its in sertion into the casing, and lead-'feeding mechanism carried by the tube.

2l. A pencil comprising a casing, a cap tube in the casing, a cap tube extension telescoped onto the cap tube, a bearing sleeve in which the cap tube is rotatively mounted, said bearing sleeve being held by the casing against rotation and held against axial movement on the captube by the cap .tube extension and a bead on the cap tube, and leid-feeding mechanism carried by the cap tu e.

. 22. A pencil including an engageable portion, lead propelling means, and an attachment interposed between said engageable portion and a part of the propelling means, and rotatably carried by one of them While frictionally engaging the other against rotation to constitute a frictional retaining means for said part of the prgpelling means.

23. A pencil including an engageable portion, lead propelling means, and an attachment for the latter comprising an element rotatably carried by a part of the propelling means and adapted' to detachably engage said engageabl'e portion to hold said element against rotation and form releasable retaining means for the propelling means.

HOWARD L. FISCHER. 

